Paxman Valenta

[2] It is still in use in various marine applications today, such as the Upholder / Victoria class submarines, and additionally to provide the electrical power to propel and operate the Royal Navy's Type 23 frigates.

[10] In May 2005, First Great Western had Brush Traction fit two with MTU 16V4000 R41 engines,[11] these V16 units which use common rail fuel injection are ultimately capable of developing 2,720 kilowatts (3,700 metric horsepower; 3,650 brake horsepower), though they are de-rated in the Class 43 HSTs to match the performance of the original Paxman engine.

[7] Judged a success, no doubt due to improved fuel economy,[7] as part of a project to extend the lives of the HSTs, First Great Western decided to re-power its entire fleet.

Great North Eastern Railway (GNER), CrossCountry, Network Rail, and Grand Central also decided to re-power their fleets with MTUs.

It received a full overhaul, and was fitted with a reconditioned Paxman Valenta RP200L engine, number S508 installed new into Virgin CrossCountry's 43153 in 2001, before re-installation into First Great Western's 43143 after a spell in storage.

[17] The engine was also fitted to the State Rail Authority's New South Wales XPT, or Express Passenger Train, which was based on the HST power car design.

Class 43 with Paxman Valenta engine at York .
New South Wales XPT , originally powered by Paxman Valenta engines.